wshobson/agents offers a plugin marketplace across seven tools including Claude Code and Codex

The repo contains 94 plugins (92 local, 2 external entries), with 202 agents, 184 skills, and 105 commands in the local source. Claude Code installs directly via the plugin marketplace; Cursor uses the committed marketplace registry; Codex CLI supports both a native marketplace and generated TOML agent/command-skill adapter paths; OpenCode, Antigravity CLI, GitHub Copilot, and Pi require cloning the repo and running make install-*, and Pi agents also depend on its sub-agent extension. Skills can be installed individually with gh skill or npx skills, requiring GitHub CLI 2.90+ or Node.js and npm. Claude Code developers can register the marketplace with /plugin marketplace add and install plugins, reusing the same Python, JavaScript, code review, and security scanning components; teams maintaining multiple toolchains must run the matching install command per tool and accept that model aliases (opus, sonnet, haiku, fable, inherit) are mapped by adapters to each tool's model settings, with some inherit entries pinned to defaults. The repo provides make generate-all, make validate STRICT=1, make garden, and plugin-eval static checks; the LLM-judge and Monte Carlo layers are experimental, not aligned with human labels, and consume quota on the account tied to ANTHROPIC_API_KEY, otherwise using Claude Code login.